<?php // $Id: edit_sentence_save.class.php,v 1.5 2007/10/10 05:25:25 nicolasconnault Exp $

///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards Martin Dougiamas		http://dougiamas.com  //
//		   (C) 2001-3001 Eloy Lafuente (stronk7) http://contiento.com  //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

/// This class will save the changes performed to one sentence

class edit_sentence_save extends XMLDBAction {

	/**
	 * Init method, every subclass will have its own
	 */
	function init() {
		parent::init();

	/// Set own custom attributes

	/// Get needed strings
		$this->loadStrings(array(
			'cannotuseidfield' => 'xmldb',
			'missingfieldsinsentence' => 'xmldb',
			'missingvaluesinsentence' => 'xmldb',
			'wrongnumberoffieldsorvalues' => 'xmldb',
			'administration' => ''
		));
	}

	/**
	 * Invoke method, every class will have its own
	 * returns true/false on completion, setting both
	 * errormsg and output as necessary
	 */
	function invoke() {
		parent::invoke();

		$result = true;

	/// Set own core attributes
		$this->does_generate = ACTION_NONE;
		//$this->does_generate = ACTION_GENERATE_HTML;

	/// These are always here
		global $CFG, $XMLDB;

	/// Do the job, setting result as needed

	/// Get parameters
		$dirpath = required_param('dir', PARAM_PATH);
		$dirpath = $CFG->dirroot . stripslashes_safe($dirpath);

		$statementparam = strtolower(required_param('statement', PARAM_CLEAN));
		$sentenceparam = strtolower(required_param('sentence', PARAM_ALPHANUM));

		$fields = required_param('fields', PARAM_CLEAN);
		$fields = trim(stripslashes_safe($fields));
		$values = required_param('values', PARAM_CLEAN);
		$values = trim(stripslashes_safe($values));

		$editeddir =& $XMLDB->editeddirs[$dirpath];
		$structure =& $editeddir->xml_file->getStructure();
		$statement =& $structure->getStatement($statementparam);
		$sentences =& $statement->getSentences();

		$oldsentence = $sentences[$sentenceparam];

		if (!$statement) {
			$this->errormsg = 'Wrong statement specified: ' . $statementparam;
			return false;
		}

	/// For now, only insert sentences are allowed
		if ($statement->getType() != XMLDB_STATEMENT_INSERT) {
			$this->errormsg = 'Wrong Statement Type. Only INSERT allowed';
			return false;
		}

		$errors = array();	/// To store all the errors found

	/// Build the whole sentence
		$sentence = '(' . $fields . ') VALUES (' . $values . ')';

	/// Perform some checks
		$fields = $statement->getFieldsFromInsertSentence($sentence);
		$values = $statement->getValuesFromInsertSentence($sentence);

		if (in_array('id', $fields)) {
			$errors[] = $this->str['cannotuseidfield'];
		}
		if ($result && count($fields) == 0) {
			$errors[] = $this->str['missingfieldsinsentence'];
		}
		if ($result && count($values) == 0) {
			$errors[] = $this->str['missingvaluesinsentence'];
		}
		if ($result && count($fields) != count($values)) {
			$errors[] = $this->str['wrongnumberoffieldsorvalues'];
		}

		if (!empty($errors)) {
		/// Prepare the output
			$site = get_site();
			$navlinks = array();
			$navlinks[] = array('name' => $this->str['administration'], 'link' => '../index.php', 'type' => 'misc');
			$navlinks[] = array('name' => 'XMLDB', 'link' => 'index.php', 'type' => 'misc');
			$navigation = build_navigation($navlinks);
			print_header("$site->shortname: XMLDB", "$site->fullname", $navigation);
			notice ('<p>' .implode(', ', $errors) . '</p>
					 <p>' . s($sentence),
					'index.php?action=edit_sentence&amp;sentence=' .$sentenceparam . '&amp;statement=' . urlencode($statementparam) . '&amp;dir=' . urlencode(str_replace($CFG->dirroot, '', $dirpath)));
			die; /// re-die :-P
		}

	/// Continue if we aren't under errors
		if (empty($errors)) {
			$sentences[$sentenceparam] = $sentence;

		/// If the sentence has changed from the old one, change the version
		/// and mark the statement and structure as changed
			if ($oldsentence != $sentence) {
				$statement->setChanged(true);
				$structure->setVersion(userdate(time(), '%Y%m%d', 99, false));
			/// Mark as changed
				$structure->setChanged(true);
			}

		/// Launch postaction if exists (leave this here!)
			if ($this->getPostAction() && $result) {
				return $this->launch($this->getPostAction());
			}
		}

	/// Return ok if arrived here
		return $result;
	}
}
?>
